Fluid-pressure device



- Aug. 21, 1923. 1,465,471

H. B. GRAHAM FLUID PRESSURE DEVI GE 1 y invention relates;

shaft and tubing,

Patented Aug. 23, 1923.

ca rn sir HARLANIJ B. GRAHAM, OF SAN FLUID-PRESSURE DEVICE.

Application filed November 17, 1919.

To all whom it may concern.

State of California,

the following is a specification.

to well pumps. In pumps of the class commonly known to the have invented. a new i and useful Fluid-Pressure Device, of which cular casing 21 provided with a Serial No. 338

head closed at the is provided with a of a discharge pipe 13 by means of su JQSE, CALIFORNIA.

laid an upper end witha top 17 thereby form ng a water chamber. 18

which water outlet consisting 19. Secured to the head itable bolts is a cirraised floor or horizontal CllVlSlOn wall 22 which has a central opening 23 trade as inclosed line shaft turbine b as fluid is under COIISIClQIablG pressure. Packing boxes are now in common use to prevent this leakage,

but they are unsatisfactory when new, deteriorate rapidly, :cause-a considerable wear on the shaft, and fail to accomplish the purpose of preventing such leakage. Under such conditionsv it is common to connect a small pump with the tubing so that the fluid in the tubing may be replenished.

The principal'object of my invent-ion is to produce a device of simple form and contween the shaft and tubing. and at the same time do away with the necessity of having a pump to supply oil to the tubing.

ther objects and advantages will appear hereinafter from the following description and drawings.

Referring to the drawings which are for illustrative purposes only,

Fig. 1 is a vertical sectional View of the owing the head equipped with a device embodying'a form of my invention. 1

Fi 2 is a sectional plan view on a reduce scale on line 2-2, Fig. 1, and

Fig. 3 .is a vertical sectional view on an enlarged scale on line 3 3, Fig. 1.

In the drawings, I have shown my device mounted upon a waterpump, the well casing .being indicated at 11' and the water column at 12. The pump head 13 is supported upon a concrete block indicated at 14 resting upon the ground, the casing 11 being closed atthe top by the concrete and the' water column extending through the concrete and t readed into the base 15-of the'head; i 16 designates the circular side wall of the any suitable powe through which extends r source (not Surrounding the shaft 24 below the top 1'? of the head is the oil upper end unoerside of tube or tubing 26, the

of the tube abutting against the the top '17. i

28 designates a shown) bushing threaded into the upper end of the tube 26 and into the top 17 of the head.

lhe space enclosed within the floor 22,

the side walls of the casing of the head forms a chamber 29 in which a circular disk a threaded portion tween collars 32 and less diameter than casing 21, leaving around the edge of the upper portion 36 ot the d1sk 30 and a chamber below the P Mounted upon th 30 are two radially angle disk by means of These. plugs each h which slidably end of which disposed blade face of the floor 22. tically 21 and the top 30 threaded on 31 of the shaft 24 be 33. The disk 30 is of the inner walls of the a circularpassage 35 the disk and connecting the chamber above lower portion 37 of the disk 30. e upper face of the disk disposed rotating blades iron and secured to the headed screw plugs 41. ave a central bore 41-2 in extends a pin 43, the outer is threaded 4.4 slidable against the under into a radially The blades 44 are elasheld against the fioor22 by means of coiled springs 45 on each blade 40 is high enough to plug 41. extend along the side of its associated plate and together with the plate may closes the space from the of the upper chamber length.

be termed a ane which top to the bottom throughout their The top 17 oi the head 13 is provided with stationary bl top 17 by means have slidably ades 47 secured to the of headed plugs 48 which mounted therein pins 49 which are secured into plates 50 which are elastically held against the disk 30 by means of coiled springs 51.

52 d collar 32 and the esignates a closure ring between the wall 22 being held in place'by'means of screws or bolts 55 the lower end of the tubing in 28 thereby preventing oil leakage from the assuming that the oilin the of the chamber is prevented in the distance extends inwardly designates a pipe having a valve 56 by means of which oil is introduced into the top chamber 36 through an opening 57.

The device operates in the following manner:

It is understood ing 26 is filled with rotates and that the that in practice the tuboil in which the shaft water i the well is pumped through the water column 12 into the head 13 and thence through the discharge pipe 19. There being pressure on '26, the oil contained therein is forced upwardly and due to such pressure is forced out of the upper end-of the tubing 26 between the bushing 28 and the tubing. With my device 1 prevent this leakage oi the oil by placing oil in the chamber above the head until the lower portion 37 is filled with oiland the.

upper portion 36 is partially filled withoil. As the pump is operated the shaft and disk 30 thereon revolve in the chamber and the rotating blades L0 with their associated plates 44k whirl the oil in the upper portion 36' of the chamber, which oil is thrown outwardly by centrifugal force thereby building up pressure in the outer circumference of the upper portion 36 and in the passage 35 against theoil in the lower portion 37 of the chamber, which in turn places ressure against the upper end of the bush- 3 from leaking past the bushing. The oil in the lower portion of the chamber is prevented from taking up the motion of the oil in the upper portion of the chamber by means of the stationary blades 47 and their associated plates 50 mounted on the top 17 of the head. Assuming that the upper portion of the chamber is partly filled with oil, the action of the parts just described causes the fluid, that is, the oil in the upper chamber to till the outer portion of the upper chamber.

etting a pressure on- It is evident that by the oil at the outer edge of the disk 30, due Vto-centriztugal force, equal to thepressure of the oilrin the tube 26 thatthere will be no tubing into the chamber, lower portion as above described; The pressure due to centrifugal force at the outer edge of the d sk will vary according 7 (but not proportionately). to the distance to' which the oil in the upper chamber extendsfrom the edge toward the center, that is the in the tubing will simply cause a variation toward the shaft, an in- 111 the tubing causing crease in the pressure a inward movement of the oil in the upper chamber toward the shaft,

while a decrease in pressure in the tubing will cause oil. in this manner tion of the upperidue to the pressure downward ing a casing, a

from whirling the oil in theupper chamber upper and lower portion, lesser diameter than the inner wall of the a slight movement of the chamber outwardly. 7 1 7 If there are bearing surfaces for the shaft within the tubing and the fluid within the tubingis lubricant, some delivery of fluid into the tubing may be desirable. This can readily beaccomplished by introducing oil into the' upper through. the pipe and opening 51in thewall 2:2. There being-nopressure' at such point of introduction, it'will be understood that oil 7 upper chamber by gravity. The-addition of will increase the column of oil, which inturnwill-increase the pres sure at the outer edge of the disk 30, which in turn willcause a slight movement of, theoil the upper chamber near the shaft so introduced will flow into the I fluid downwardlv in the tubin until the i i u 7 r E: V

pressures are again equal :in the outer porchamber and in the tubing.' Q

As 7 the pressure on all parts ot'fthe underside oiithe disk30 is the obtained on the upper side of they-disk at only the outside'edge'of the: same, it isfevident that the upward pressure ,ont'ne' disk of the column or 011 bemaximumpressurel V.

neath the disk Wlll be greater thanthe pressure on the disk. jTlllS is because the whole under surface of thedisk is subject to the maximum pressurewhile only that portion of the upper surface of the disk at the outside edge of the'same issubject to the maximum pressure, the pressure on the upper facerof-the disk varying from the maximum pressure at the outside edge of the same to zero atthe point onthe disk to which the column ofoil extendsin wardly. Such condition results in arforce 'exertedupwardly on1the1 shai't 24 by the plate '30 which torce'will vary as sure in the tubing varies, with a greater pressure in the tubing and less with a smaller pressure, the-result ing that the load onithe bearings in the head of the turbine will be lessened;

What 1 claim is r the pres-;-. being i greater, 1

'1. l t-fluid pressure sealing device compris closed chamber formed in the casing, a rotatable shalt, a disk mounted on the shaft dividing. said chamber into an" upper and lower portionjsaiddisir being of lesser diameter than the inner ,wall of-pthe f chamber thereby forming a circular passage connecting theupper portion and lower portion of the chamber, andibladeime ansron the disk extending into the upper portion otthe chamber int engagement with the y walls oi? said chamber.

2. A fluid pressure 'sealing device compris- V mg acaising, a closed'chambef formed in the casing, arotatable shaft, a disk mounted-on the shaft dividing said said disk "being of chamber into; an :1:

eeann chamber thereby forming a circular passage connecting the upper portion and lower portion of the chamber, blades on the disk extending into the upper portion of the chamber into engagement with the walls of said chamber, and stationary blades mounted in the lower portion of the chamber.

3. A fluid pressure sealing device comprising a casing having a chamber therein containing fluid, a disk in said chamber dividing the chamber into an upper portion and a lower portion having aconnecting passage, and blade meansmounted on the upper side of said disk extending into engagement with the walls of the chamber for whirling the fluid in the upper portion of the chamber.

4:. A fluid pressure sealing device comprising a casing having a chamber therein containing fluid, a horizontally disposed disk in said chamber dividing the chamber into an upper portion and a lower portion having a connecting passage, radially disposed means on the upper face of said disk in said chamber engaging said disk for whirling the fluid in the upper portion of the chamber, and means for preventing whirling movement of the fluid in the lower portion of the chamber. V a V 5. A fluid pressure sealing device comprising a casing having a chamber therein containing a fluid, a shaft extending into said chamber, a circular disk mounted on said shaft so arranged as to form a circular passage between the disk and walls of the casing, radially disposed blades on said disk engaging the walls of said chamber for imparting a whirling movement to the fluid in the upper portion of the chamber, and radially disposed blades in said chamber en aging said disk for preventing whir ing movement of the fluid in the lower portion of the chamber.

6. A fluid pressure sealing device comprising a casing having a chamber therein containing a fluid, a shaft extending into said chamber, a circular disk mounted on said shaft so arranged as to form a circular passage between the disk and walls of the casing, blades secured to the upper face of said disk extending into the upper portion of said chamber, plates resiliently mounted on said disk to engage the top of the chamber and together with their associated plates forming vanes to impart a whirling motion to the fluid in the upper portion of the chamber, stationary plates secured to the bottom of the casing extending into the lower ortion of the chamber, and plates resiliently mounted on the bottom of the casing, which resiliently engage the under face of the disk and together with the stationary blades constitute vanes to prevent whirling motion of the fluid in the lower portion of the chamber.

7. A fluid pressure sealing device for rotary pumps comprising a rotating shaft, a tubing enclosing a portion of the shaft, a casing at the top ofthe tubing having a chamber formed therein, a disk mounted on the shaft in said chamber leaving a circular passage between the edge of the disk and sides of the chamber, fluid in said tubing and said chamber, means on the disk engaging the walls of said chamber for imparting a whirling movement to the fluid in the chamber above the disk, and means for preventing whirling movement of the fluid in the chamber below the disk.

8. A fluid pressure sealing device for rotary pumps comprising a rotating shaft, a tubing enclosing a portion of the shaft, a casing at the top of the tubing having a chamber formed therein, a disk mounted on the shaft in said chamber leaving a circular passage between the edge of the disk and sides of the chamber, fluid in said tubing and said chamber, means on the disk for imparting a whirling movement to the fluid in the chamber above the disk, means in said chamber engaging said disk for preventing whirling movement of the fluid in the chamber below the disk, and means for delivering fluid to the chamber above the disk.

9. A fluid pressure sealing device for well pumps having an enclosed rotatable line shaft, comprising a tubing enclosing said shaft throughout a portion of its length, a casing at the top of said tubing forming a pressure chamber, a bushing on said shaft threaded into the upper end of said tubing extending into said chamber, a disk in said chamber secured to said shaft, said disk dividing said chamber into an upper portion and a lower portion connected by a circular passage between the edge of the disk and the casing, said tubing and said casing having oil therein, means on the disk for whirling the oil in the upper portion of the chamber, and means in the lower portion of the chamher for preventing whirling of the oil in the lower chamber. 7 v

In testimony whereof, I have hereunto set my hand at San Jose, California, this 8th day of November, 1919.

HARLAND B. GRAHAM. 

